A landform class assigned to the whole 250 m mesh and used to estimate AVS30. The name alone does not determine safety, and it is model data rather than a borehole survey at the station.
Hachijo Town earthquake and Shindo history in 2016
八丈町
This annual view includes only earthquakes from 2016 for which stations associated with Hachijo Town recorded Shindo.
Data period: 1 January–31 December 2016Data period: 1 January–31 December 2016
In 2016, stations associated with Hachijo Town reported local Shindo for 4 earthquakes. The highest local level recorded that year was Shindo 1.
Observed events42016
Highest local Shindo12016
Data period: 1 January–31 December 2016 · 4 observed earthquakes
2016 · Clear filtersObservation history · 2016
This history counts earthquakes observed at stations in the place, not earthquakes whose epicentre lies inside its boundary. Counts can change as stations are updated and older or corrected observations are added.
First observation: Jan 24, 2015
All yearsObserved events by year
Choose a year to update the event history and local Shindo distribution.
2016
All ShindoShindo observed in this place
The highest reading from stations in this place, not the maximum Shindo of the whole event.
Data period: 1 January–31 December 2016
Observation history · 2016
4 observed earthquakes
- 震度1Nov 22, 2016, 05:59 JSTOff the Coast of Fukushima PrefectureShindo in this place: 1 · Event maximum Shindo: 5−M7.310 km
- 震度1Jul 14, 2016, 11:17 JSTAdjacent Sea of Hachijojima IslandShindo in this place: 1 · Event maximum Shindo: 1M5.210 km
- 震度1Jul 12, 2016, 05:54 JSTAdjacent Sea of Hachijojima IslandShindo in this place: 1 · Event maximum Shindo: 1M4.610 km
- 震度1Jul 11, 2016, 15:22 JSTAdjacent Sea of Hachijojima IslandShindo in this place: 1 · Event maximum Shindo: 1M5.210 km
Ground & J-SHIS
The context below uses the place's full available history and reference models; it is not part of the 2016 statistics.
Local seismic profile
Where the shaking usually comes from
Source regions of earthquakes observed here, ordered by the number of reports.
4
Adjacent Sea of Hachijojima Island八丈島近海
483
Off the east Coast of Hachijojima Island八丈島東方沖
402
Adjacent Sea of Miyakejima Island三宅島近海
42
Off the southeast Coast of Chiba Prefecture千葉県南東沖
32
Off the Coast of Fukushima Prefecture福島県沖
31
Adjacent Sea of Torishima Island鳥島近海
3Reference model · not a forecast J-SHIS (NIED) · 250 m · 4939563332
J-SHIS / NIEDGround conditions near an observation station
J-SHIS data for the 250 m mesh containing 八丈町三根.
How to read these values
The average speed of an S-wave through the upper 30 metres. A lower value generally indicates softer material that can amplify shaking more. J-SHIS uses this value to estimate the amplification shown to the right. It is not predicted Shindo.
For the same incoming wave, local ground conditions may make peak-motion velocity at the surface about 34% higher than at engineering bedrock (Vs = 400 m/s). This value describes motion velocity—it does not multiply magnitude or forecast ground acceleration.
Ground conditions can change over short distances. These values do not rate the whole place or the safety of a building, and they cannot predict an earthquake. Source: J-SHIS (NIED), V4 model; processed for presentation by JISHINDESU.
Local seismic profile
Nearby places
Municipalities nearest to the representative station position.
Understand local Shindo in context
Guides to this place’s history, seismic intensity and notification tools.
8 min readJapan’s Shindo Scale Explained: What Levels 0–7 Mean
Shindo is Japan’s earthquake intensity scale. See what shaking each level means, from 0 to 7, and why a local Shindo reading is different from magnitude.
Read guide →10 min readHow to use the JISHINDESU interactive mapA guide to the redesigned map panel: adding and switching places, ten years of history, filters, local Shindo readings, sharing and notifications.
Read guide →6 min readAre earthquakes becoming more frequent in Japan?How to compare earthquake counts fairly—and why a few active days do not prove a lasting increase.
Read guide →4 min readAway from home? Monitor earthquakes in your Japanese townUse home as the reference point and receive notifications without an account when a station within the selected radius reports your chosen Shindo level.
Read guide →